Backspace glitch? Classic. Those old engines were so thin they let you push the world out of its loop. In a remaster the physics is usually tighter, but if the level geometry is still the same, a timing tweak or a tiny invisible wall hit can still do the trick. Just remember: the newer code usually guards against the same buffer overflow, so you might have to patch a small part of the collision routine or slip the key press into a hidden state. Good luck hunting the ghost—it's not as clean as the original, but the payoff is worth the headache.